Korea League

K League (Korea Professional Football League) is South Koreas professional association football league including first division K League Classic and second division K League Challenge.
There was no official system of promotion and relegation. However, beginning in 2013, the champions of K League Challenge is eligible for promotion to the K League Classic, provided they had met certain criteria. In 2012 season, two teams from K League Classic was relegated to K League Challenge, and in 2013, two teams will be relegated to K League Challenge, and 11th placed team from K League Classic and the first placed team from K League Challenge will have a relegation play-off.